| 合成孔径声呐Chirp Scaling成像算法 |
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| 引用本文： | 张友文,孙大军,田坦,张殿伦. 合成孔径声呐Chirp Scaling成像算法[J]. 声学技术, 2005, 24(4): 193-196 |
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| 作者姓名： | 张友文 孙大军 田坦 张殿伦 |
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| 作者单位： | 哈尔滨工程大学水声工程学院,哈尔滨,150001 |
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| 摘 要： | 在合成孔径声呐领域中经典的成像处理方法是距离-多普勒算法。距离-多普勒算法的主要缺点是在进行方位处理时需要进行距离二次脉压和在进行距离徙动校正时需要进行插值处理,这样将导致运算量迅速增加,并且降低了成像精度。而ChirpScaling算法是在二维频域中精确实现距离门徙动校正和二次距离压缩,避免了插值运算,用该算法处理了仿真点目标的回波数据,结果表明该算法既能够实现更加精确的成像又能够避免插值运算而提高运算效能。
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| 关 键 词： | 合成孔径声呐 ChirpScaling算法 距离单元徙动修正 |
| 文章编号： | 1000-3630（2005）-04-0193-04 |
| 收稿时间： | 2004-09-02 |
| 修稿时间： | 2004-09-022004-12-20 |
A synthetic aperture sonar imaging algorithm using chirp scaling |
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| ZHANG You-wen,SUN Da-jun,TIAN Tan,ZHANG Dian-lun. A synthetic aperture sonar imaging algorithm using chirp scaling[J]. Technical Acoustics, 2005, 24(4): 193-196 |
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| Authors: | ZHANG You-wen SUN Da-jun TIAN Tan ZHANG Dian-lun |
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| Affiliation: | College of Underwater Acoustics Engineering, Harbin Engineering University, Harbin 150001, China |
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| Abstract: | Traditionally,SAS imaging uses the rangeDoppler(RD) algorithm.Main disadvantages of the RD algorithm include: 1) Secondary range compression is needed in azimuth,and 2) Interpolation in range cell migration correction requires significant computation cost and leads to loss of image quality.This paper develops a chirpscaling algorithm that performs range cell migration correction and secondary range compression accurately in the 2D frequency domain,and avoids interpolation.Simulation in processing point target echoes shows that the described algorithm can give more accurate images. |
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| Keywords: | synthetic aperture sonar chirp scaling algorithm range cell migration correction |
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